content: /*
   * 支付宝开放平台API
   * 支付宝开放平台v3协议文档
   *
   * The version of the OpenAPI document: 2025-08-26
   * 
   *
   * NOTE: This class is auto generated by OpenAPI Generator (https://openapi-generator.tech).
   * https://openapi-generator.tech
   * Do not edit the class manually.
   */
  
  
  package com.alipay.v3.model;
  
  import java.util.Objects;
  import java.util.Arrays;
  import com.google.gson.TypeAdapter;
  import com.google.gson.annotations.JsonAdapter;
  import com.google.gson.annotations.SerializedName;
  import com.google.gson.stream.JsonReader;
  import com.google.gson.stream.JsonWriter;
  import io.swagger.annotations.ApiModel;
  import io.swagger.annotations.ApiModelProperty;
  import java.io.IOException;
  
  import com.google.gson.Gson;
  import com.google.gson.GsonBuilder;
  import com.google.gson.JsonArray;
  import com.google.gson.JsonDeserializationContext;
  import com.google.gson.JsonDeserializer;
  import com.google.gson.JsonElement;
  import com.google.gson.JsonObject;
  import com.google.gson.JsonParseException;
  import com.google.gson.TypeAdapterFactory;
  import com.google.gson.reflect.TypeToken;
  
  import java.lang.reflect.Type;
  import java.util.HashMap;
  import java.util.HashSet;
  import java.util.Map;
  import java.util.Map.Entry;
  import java.util.Set;
  
  import com.alipay.v3.JSON;
  
  /**
   * IssueRuleInfo
   */
  @javax.annotation.Generated(value = "org.openapitools.codegen.languages.JavaClientCodegen")
  public class IssueRuleInfo {
    public static final String SERIALIZED_NAME_EFFECTIVE_PERIOD = "effective_period";
    @SerializedName(SERIALIZED_NAME_EFFECTIVE_PERIOD)
    private String effectivePeriod;
  
    public static final String SERIALIZED_NAME_INVALID_MODE = "invalid_mode";
    @SerializedName(SERIALIZED_NAME_INVALID_MODE)
    private Integer invalidMode;
  
    public static final String SERIALIZED_NAME_INVALID_MODE_VALUE = "invalid_mode_value";
    @SerializedName(SERIALIZED_NAME_INVALID_MODE_VALUE)
    private String invalidModeValue;
  
    public static final String SERIALIZED_NAME_ISSUE_AMOUNT_VALUE = "issue_amount_value";
    @SerializedName(SERIALIZED_NAME_ISSUE_AMOUNT_VALUE)
    private String issueAmountValue;
  
    public static final String SERIALIZED_NAME_ISSUE_END_DATE = "issue_end_date";
    @SerializedName(SERIALIZED_NAME_ISSUE_END_DATE)
    private String issueEndDate;
  
    public static final String SERIALIZED_NAME_ISSUE_RULE_ID = "issue_rule_id";
    @SerializedName(SERIALIZED_NAME_ISSUE_RULE_ID)
    private String issueRuleId;
  
    public static final String SERIALIZED_NAME_ISSUE_RULE_NAME = "issue_rule_name";
    @SerializedName(SERIALIZED_NAME_ISSUE_RULE_NAME)
    private String issueRuleName;
  
    public static final String SERIALIZED_NAME_ISSUE_START_DATE = "issue_start_date";
    @SerializedName(SERIALIZED_NAME_ISSUE_START_DATE)
    private String issueStartDate;
  
    public static final String SERIALIZED_NAME_ISSUE_TYPE = "issue_type";
    @SerializedName(SERIALIZED_NAME_ISSUE_TYPE)
    private String issueType;
  
    public static final String SERIALIZED_NAME_OUTER_SOURCE_ID = "outer_source_id";
    @SerializedName(SERIALIZED_NAME_OUTER_SOURCE_ID)
    private String outerSourceId;
  
    public static final String SERIALIZED_NAME_QUOTA_TYPE = "quota_type";
    @SerializedName(SERIALIZED_NAME_QUOTA_TYPE)
    private String quotaType;
  
    public static final String SERIALIZED_NAME_SHARE_MODE = "share_mode";
    @SerializedName(SERIALIZED_NAME_SHARE_MODE)
    private Integer shareMode;
  
    public static final String SERIALIZED_NAME_TARGET_ID = "target_id";
    @SerializedName(SERIALIZED_NAME_TARGET_ID)
    private String targetId;
  
    public static final String SERIALIZED_NAME_TARGET_TYPE = "target_type";
    @SerializedName(SERIALIZED_NAME_TARGET_TYPE)
    private String targetType;
  
    public IssueRuleInfo() { 
    }
  
    public IssueRuleInfo effectivePeriod(String effectivePeriod) {
      
      this.effectivePeriod = effectivePeriod;
      return this;
    }
  
     /**
     * 生效时间段
     * @return effectivePeriod
    **/
    @javax.annotation.Nullable
    @ApiModelProperty(value = "生效时间段")
  
    public String getEffectivePeriod() {
      return effectivePeriod;
    }
  
  
    public void setEffectivePeriod(String effectivePeriod) {
      this.effectivePeriod = effectivePeriod;
    }
  
  
    public IssueRuleInfo invalidMode(Integer invalidMode) {
      
      this.invalidMode = invalidMode;
      return this;
    }
  
     /**
     * 累计类型，默认为0 可选值：0（不可累计）、1（可累计）、2（累计天数）、3（累计到指定日期）
     * @return invalidMode
    **/
    @javax.annotation.Nullable
    @ApiModelProperty(value = "累计类型，默认为0 可选值：0（不可累计）、1（可累计）、2（累计天数）、3（累计到指定日期）")
  
    public Integer getInvalidMode() {
      return invalidMode;
    }
  
  
    public void setInvalidMode(Integer invalidMode) {
      this.invalidMode = invalidMode;
    }
  
  
    public IssueRuleInfo invalidModeValue(String invalidModeValue) {
      
      this.invalidModeValue = invalidModeValue;
      return this;
    }
  
     /**
     * 累计类型值
     * @return invalidModeValue
    **/
    @javax.annotation.Nullable
    @ApiModelProperty(value = "累计类型值")
  
    public String getInvalidModeValue() {
      return invalidModeValue;
    }
  
  
    public void setInvalidModeValue(String invalidModeValue) {
      this.invalidModeValue = invalidModeValue;
    }
  
  
    public IssueRuleInfo issueAmountValue(String issueAmountValue) {
      
      this.issueAmountValue = issueAmountValue;
      return this;
    }
  
     /**
     * 发放金额，单位元
     * @return issueAmountValue
    **/
    @javax.annotation.Nullable
    @ApiModelProperty(value = "发放金额，单位元")
  
    public String getIssueAmountValue() {
      return issueAmountValue;
    }
  
  
    public void setIssueAmountValue(String issueAmountValue) {
      this.issueAmountValue = issueAmountValue;
    }
  
  
    public IssueRuleInfo issueEndDate(String issueEndDate) {
      
      this.issueEndDate = issueEndDate;
      return this;
    }
  
     /**
     * 发放规则有效结束时间
     * @return issueEndDate
    **/
    @javax.annotation.Nullable
    @ApiModelProperty(value = "发放规则有效结束时间")
  
    public String getIssueEndDate() {
      return issueEndDate;
    }
  
  
    public void setIssueEndDate(String issueEndDate) {
      this.issueEndDate = issueEndDate;
    }
  
  
    public IssueRuleInfo issueRuleId(String issueRuleId) {
      
      this.issueRuleId = issueRuleId;
      return this;
    }
  
     /**
     * 发放规则id
     * @return issueRuleId
    **/
    @javax.annotation.Nullable
    @ApiModelProperty(value = "发放规则id")
  
    public String getIssueRuleId() {
      return issueRuleId;
    }
  
  
    public void setIssueRuleId(String issueRuleId) {
      this.issueRuleId = issueRuleId;
    }
  
  
    public IssueRuleInfo issueRuleName(String issueRuleName) {
      
      this.issueRuleName = issueRuleName;
      return this;
    }
  
     /**
     * 发放规则名称
     * @return issueRuleName
    **/
    @javax.annotation.Nullable
    @ApiModelProperty(value = "发放规则名称")
  
    public String getIssueRuleName() {
      return issueRuleName;
    }
  
  
    public void setIssueRuleName(String issueRuleName) {
      this.issueRuleName = issueRuleName;
    }
  
  
    public IssueRuleInfo issueStartDate(String issueStartDate) {
      
      this.issueStartDate = issueStartDate;
      return this;
    }
  
     /**
     * 发放规则有效起始时间
     * @return issueStartDate
    **/
    @javax.annotation.Nullable
    @ApiModelProperty(value = "发放规则有效起始时间")
  
    public String getIssueStartDate() {
      return issueStartDate;
    }
  
  
    public void setIssueStartDate(String issueStartDate) {
      this.issueStartDate = issueStartDate;
    }
  
  
    public IssueRuleInfo issueType(String issueType) {
      
      this.issueType = issueType;
      return this;
    }
  
     /**
     * 发放类型
     * @return issueType
    **/
    @javax.annotation.Nullable
    @ApiModelProperty(value = "发放类型")
  
    public String getIssueType() {
      return issueType;
    }
  
  
    public void setIssueType(String issueType) {
      this.issueType = issueType;
    }
  
  
    public IssueRuleInfo outerSourceId(String outerSourceId) {
      
      this.outerSourceId = outerSourceId;
      return this;
    }
  
     /**
     * 外部发放规则id
     * @return outerSourceId
    **/
    @javax.annotation.Nullable
    @ApiModelProperty(value = "外部发放规则id")
  
    public String getOuterSourceId() {
      return outerSourceId;
    }
  
  
    public void setOuterSourceId(String outerSourceId) {
      this.outerSourceId = outerSourceId;
    }
  
  
    public IssueRuleInfo quotaType(String quotaType) {
      
      this.quotaType = quotaType;
      return this;
    }
  
     /**
     * 额度类型
     * @return quotaType
    **/
    @javax.annotation.Nullable
    @ApiModelProperty(value = "额度类型")
  
    public String getQuotaType() {
      return quotaType;
    }
  
  
    public void setQuotaType(String quotaType) {
      this.quotaType = quotaType;
    }
  
  
    public IssueRuleInfo shareMode(Integer shareMode) {
      
      this.shareMode = shareMode;
      return this;
    }
  
     /**
     * 是否可转赠
     * @return shareMode
    **/
    @javax.annotation.Nullable
    @ApiModelProperty(value = "是否可转赠")
  
    public Integer getShareMode() {
      return shareMode;
    }
  
  
    public void setShareMode(Integer shareMode) {
      this.shareMode = shareMode;
    }
  
  
    public IssueRuleInfo targetId(String targetId) {
      
      this.targetId = targetId;
      return this;
    }
  
     /**
     * 目标id
     * @return targetId
    **/
    @javax.annotation.Nullable
    @ApiModelProperty(value = "目标id")
  
    public String getTargetId() {
      return targetId;
    }
  
  
    public void setTargetId(String targetId) {
      this.targetId = targetId;
    }
  
  
    public IssueRuleInfo targetType(String targetType) {
      
      this.targetType = targetType;
      return this;
    }
  
     /**
     * 发放规则归属的目标类型
     * @return targetType
    **/
    @javax.annotation.Nullable
    @ApiModelProperty(value = "发放规则归属的目标类型")
  
    public String getTargetType() {
      return targetType;
    }
  
  
    public void setTargetType(String targetType) {
      this.targetType = targetType;
    }
  
    /**
     * A container for additional, undeclared properties.
     * This is a holder for any undeclared properties as specified with
     * the 'additionalProperties' keyword in the OAS document.
     */
    private Map<String, Object> additionalProperties;
  
    /**
     * Set the additional (undeclared) property with the specified name and value.
     * If the property does not already exist, create it otherwise replace it.
     *
     * @param key name of the property
     * @param value value of the property
     * @return the IssueRuleInfo instance itself
     */
    public IssueRuleInfo putAdditionalProperty(String key, Object value) {
      if (this.additionalProperties == null) {
          this.additionalProperties = new HashMap<String, Object>();
      }
      this.additionalProperties.put(key, value);
      return this;
    }
  
    /**
     * Return the additional (undeclared) property.
     *
     * @return a map of objects
     */
    public Map<String, Object> getAdditionalProperties() {
      return additionalProperties;
    }
  
    /**
     * Return the additional (undeclared) property with the specified name.
     *
     * @param key name of the property
     * @return an object
     */
    public Object getAdditionalProperty(String key) {
      if (this.additionalProperties == null) {
          return null;
      }
      return this.additionalProperties.get(key);
    }
  
  
    @Override
    public boolean equals(Object o) {
      if (this == o) {
        return true;
      }
      if (o == null || getClass() != o.getClass()) {
        return false;
      }
      IssueRuleInfo issueRuleInfo = (IssueRuleInfo) o;
      return Objects.equals(this.effectivePeriod, issueRuleInfo.effectivePeriod) &&
          Objects.equals(this.invalidMode, issueRuleInfo.invalidMode) &&
          Objects.equals(this.invalidModeValue, issueRuleInfo.invalidModeValue) &&
          Objects.equals(this.issueAmountValue, issueRuleInfo.issueAmountValue) &&
          Objects.equals(this.issueEndDate, issueRuleInfo.issueEndDate) &&
          Objects.equals(this.issueRuleId, issueRuleInfo.issueRuleId) &&
          Objects.equals(this.issueRuleName, issueRuleInfo.issueRuleName) &&
          Objects.equals(this.issueStartDate, issueRuleInfo.issueStartDate) &&
          Objects.equals(this.issueType, issueRuleInfo.issueType) &&
          Objects.equals(this.outerSourceId, issueRuleInfo.outerSourceId) &&
          Objects.equals(this.quotaType, issueRuleInfo.quotaType) &&
          Objects.equals(this.shareMode, issueRuleInfo.shareMode) &&
          Objects.equals(this.targetId, issueRuleInfo.targetId) &&
          Objects.equals(this.targetType, issueRuleInfo.targetType)&&
          Objects.equals(this.additionalProperties, issueRuleInfo.additionalProperties);
    }
  
    @Override
    public int hashCode() {
      return Objects.hash(effectivePeriod, invalidMode, invalidModeValue, issueAmountValue, issueEndDate, issueRuleId, issueRuleName, issueStartDate, issueType, outerSourceId, quotaType, shareMode, targetId, targetType, additionalProperties);
    }
  
    @Override
    public String toString() {
      StringBuilder sb = new StringBuilder();
      sb.append("class IssueRuleInfo {\n");
      sb.append("    effectivePeriod: ").append(toIndentedString(effectivePeriod)).append("\n");
      sb.append("    invalidMode: ").append(toIndentedString(invalidMode)).append("\n");
      sb.append("    invalidModeValue: ").append(toIndentedString(invalidModeValue)).append("\n");
      sb.append("    issueAmountValue: ").append(toIndentedString(issueAmountValue)).append("\n");
      sb.append("    issueEndDate: ").append(toIndentedString(issueEndDate)).append("\n");
      sb.append("    issueRuleId: ").append(toIndentedString(issueRuleId)).append("\n");
      sb.append("    issueRuleName: ").append(toIndentedString(issueRuleName)).append("\n");
      sb.append("    issueStartDate: ").append(toIndentedString(issueStartDate)).append("\n");
      sb.append("    issueType: ").append(toIndentedString(issueType)).append("\n");
      sb.append("    outerSourceId: ").append(toIndentedString(outerSourceId)).append("\n");
      sb.append("    quotaType: ").append(toIndentedString(quotaType)).append("\n");
      sb.append("    shareMode: ").append(toIndentedString(shareMode)).append("\n");
      sb.append("    targetId: ").append(toIndentedString(targetId)).append("\n");
      sb.append("    targetType: ").append(toIndentedString(targetType)).append("\n");
      sb.append("    additionalProperties: ").append(toIndentedString(additionalProperties)).append("\n");
      sb.append("}");
      return sb.toString();
    }
  
    /**
     * Convert the given object to string with each line indented by 4 spaces
     * (except the first line).
     */
    private String toIndentedString(Object o) {
      if (o == null) {
        return "null";
      }
      return o.toString().replace("\n", "\n    ");
    }
  
  
    public static HashSet<String> openapiFields;
    public static HashSet<String> openapiRequiredFields;
  
    static {
      // a set of all properties/fields (JSON key names)
      openapiFields = new HashSet<String>();
      openapiFields.add("effective_period");
      openapiFields.add("invalid_mode");
      openapiFields.add("invalid_mode_value");
      openapiFields.add("issue_amount_value");
      openapiFields.add("issue_end_date");
      openapiFields.add("issue_rule_id");
      openapiFields.add("issue_rule_name");
      openapiFields.add("issue_start_date");
      openapiFields.add("issue_type");
      openapiFields.add("outer_source_id");
      openapiFields.add("quota_type");
      openapiFields.add("share_mode");
      openapiFields.add("target_id");
      openapiFields.add("target_type");
  
      // a set of required properties/fields (JSON key names)
      openapiRequiredFields = new HashSet<String>();
    }
  
   /**
    * Validates the JSON Object and throws an exception if issues found
    *
    * @param jsonObj JSON Object
    * @throws IOException if the JSON Object is invalid with respect to IssueRuleInfo
    */
    public static void validateJsonObject(JsonObject jsonObj) throws IOException {
        if (jsonObj == null) {
          if (IssueRuleInfo.openapiRequiredFields.isEmpty()) {
            return;
          } else { // has required fields
            throw new IllegalArgumentException(String.format("The required field(s) %s in IssueRuleInfo is not found in the empty JSON string", IssueRuleInfo.openapiRequiredFields.toString()));
          }
        }
        if (jsonObj.get("effective_period") != null && !jsonObj.get("effective_period").isJsonPrimitive()) {
          throw new IllegalArgumentException(String.format("Expected the field `effective_period` to be a primitive type in the JSON string but got `%s`", jsonObj.get("effective_period").toString()));
        }
        if (jsonObj.get("invalid_mode_value") != null && !jsonObj.get("invalid_mode_value").isJsonPrimitive()) {
          throw new IllegalArgumentException(String.format("Expected the field `invalid_mode_value` to be a primitive type in the JSON string but got `%s`", jsonObj.get("invalid_mode_value").toString()));
        }
        if (jsonObj.get("issue_amount_value") != null && !jsonObj.get("issue_amount_value").isJsonPrimitive()) {
          throw new IllegalArgumentException(String.format("Expected the field `issue_amount_value` to be a primitive type in the JSON string but got `%s`", jsonObj.get("issue_amount_value").toString()));
        }
        if (jsonObj.get("issue_end_date") != null && !jsonObj.get("issue_end_date").isJsonPrimitive()) {
          throw new IllegalArgumentException(String.format("Expected the field `issue_end_date` to be a primitive type in the JSON string but got `%s`", jsonObj.get("issue_end_date").toString()));
        }
        if (jsonObj.get("issue_rule_id") != null && !jsonObj.get("issue_rule_id").isJsonPrimitive()) {
          throw new IllegalArgumentException(String.format("Expected the field `issue_rule_id` to be a primitive type in the JSON string but got `%s`", jsonObj.get("issue_rule_id").toString()));
        }
        if (jsonObj.get("issue_rule_name") != null && !jsonObj.get("issue_rule_name").isJsonPrimitive()) {
          throw new IllegalArgumentException(String.format("Expected the field `issue_rule_name` to be a primitive type in the JSON string but got `%s`", jsonObj.get("issue_rule_name").toString()));
        }
        if (jsonObj.get("issue_start_date") != null && !jsonObj.get("issue_start_date").isJsonPrimitive()) {
          throw new IllegalArgumentException(String.format("Expected the field `issue_start_date` to be a primitive type in the JSON string but got `%s`", jsonObj.get("issue_start_date").toString()));
        }
        if (jsonObj.get("issue_type") != null && !jsonObj.get("issue_type").isJsonPrimitive()) {
          throw new IllegalArgumentException(String.format("Expected the field `issue_type` to be a primitive type in the JSON string but got `%s`", jsonObj.get("issue_type").toString()));
        }
        if (jsonObj.get("outer_source_id") != null && !jsonObj.get("outer_source_id").isJsonPrimitive()) {
          throw new IllegalArgumentException(String.format("Expected the field `outer_source_id` to be a primitive type in the JSON string but got `%s`", jsonObj.get("outer_source_id").toString()));
        }
        if (jsonObj.get("quota_type") != null && !jsonObj.get("quota_type").isJsonPrimitive()) {
          throw new IllegalArgumentException(String.format("Expected the field `quota_type` to be a primitive type in the JSON string but got `%s`", jsonObj.get("quota_type").toString()));
        }
        if (jsonObj.get("target_id") != null && !jsonObj.get("target_id").isJsonPrimitive()) {
          throw new IllegalArgumentException(String.format("Expected the field `target_id` to be a primitive type in the JSON string but got `%s`", jsonObj.get("target_id").toString()));
        }
        if (jsonObj.get("target_type") != null && !jsonObj.get("target_type").isJsonPrimitive()) {
          throw new IllegalArgumentException(String.format("Expected the field `target_type` to be a primitive type in the JSON string but got `%s`", jsonObj.get("target_type").toString()));
        }
    }
  
    public static class CustomTypeAdapterFactory implements TypeAdapterFactory {
      @SuppressWarnings("unchecked")
      @Override
      public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> type) {
         if (!IssueRuleInfo.class.isAssignableFrom(type.getRawType())) {
           return null; // this class only serializes 'IssueRuleInfo' and its subtypes
         }
         final TypeAdapter<JsonElement> elementAdapter = gson.getAdapter(JsonElement.class);
         final TypeAdapter<IssueRuleInfo> thisAdapter
                          = gson.getDelegateAdapter(this, TypeToken.get(IssueRuleInfo.class));
  
         return (TypeAdapter<T>) new TypeAdapter<IssueRuleInfo>() {
             @Override
             public void write(JsonWriter out, IssueRuleInfo value) throws IOException {
               JsonObject obj = thisAdapter.toJsonTree(value).getAsJsonObject();
               obj.remove("additionalProperties");
               // serialize additonal properties
               if (value.getAdditionalProperties() != null) {
                 for (Map.Entry<String, Object> entry : value.getAdditionalProperties().entrySet()) {
                   if (entry.getValue() instanceof String)
                     obj.addProperty(entry.getKey(), (String) entry.getValue());
                   else if (entry.getValue() instanceof Number)
                     obj.addProperty(entry.getKey(), (Number) entry.getValue());
                   else if (entry.getValue() instanceof Boolean)
                     obj.addProperty(entry.getKey(), (Boolean) entry.getValue());
                   else if (entry.getValue() instanceof Character)
                     obj.addProperty(entry.getKey(), (Character) entry.getValue());
                   else {
                     obj.add(entry.getKey(), gson.toJsonTree(entry.getValue()).getAsJsonObject());
                   }
                 }
               }
               elementAdapter.write(out, obj);
             }
  
             @Override
             public IssueRuleInfo read(JsonReader in) throws IOException {
               JsonObject jsonObj = elementAdapter.read(in).getAsJsonObject();
               validateJsonObject(jsonObj);
               // store additional fields in the deserialized instance
               IssueRuleInfo instance = thisAdapter.fromJsonTree(jsonObj);
               for (Map.Entry<String, JsonElement> entry : jsonObj.entrySet()) {
                 if (!openapiFields.contains(entry.getKey())) {
                   if (entry.getValue().isJsonPrimitive()) { // primitive type
                     if (entry.getValue().getAsJsonPrimitive().isString())
                       instance.putAdditionalProperty(entry.getKey(), entry.getValue().getAsString());
                     else if (entry.getValue().getAsJsonPrimitive().isNumber())
                       instance.putAdditionalProperty(entry.getKey(), entry.getValue().getAsNumber());
                     else if (entry.getValue().getAsJsonPrimitive().isBoolean())
                       instance.putAdditionalProperty(entry.getKey(), entry.getValue().getAsBoolean());
                     else
                       throw new IllegalArgumentException(String.format("The field `%s` has unknown primitive type. Value: %s", entry.getKey(), entry.getValue().toString()));
                   } else { // non-primitive type
                     instance.putAdditionalProperty(entry.getKey(), gson.fromJson(entry.getValue(), HashMap.class));
                   }
                 }
               }
               return instance;
             }
  
         }.nullSafe();
      }
    }
  
   /**
    * Create an instance of IssueRuleInfo given an JSON string
    *
    * @param jsonString JSON string
    * @return An instance of IssueRuleInfo
    * @throws IOException if the JSON string is invalid with respect to IssueRuleInfo
    */
    public static IssueRuleInfo fromJson(String jsonString) throws IOException {
      return JSON.getGson().fromJson(jsonString, IssueRuleInfo.class);
    }
  
   /**
    * Convert an instance of IssueRuleInfo to an JSON string
    *
    * @return JSON string
    */
    public String toJson() {
      return JSON.getGson().toJson(this);
    }
  }
  
  